Can Japanese Cedar and Activated Resorcinol be used together?

Based on the information from the product descriptions, Japanese Cedar (Cryptomeria Japonica Bud Extract) and Activated Resorcinol (4-Butylresorcinol) can be used together in a formulation.

There are no explicit incompatibilities listed between these two specific ingredients. Japanese Cedar works to enhance skin cell renewal and strengthen the skin barrier, while Activated Resorcinol is a potent whitening agent targeting pigmentation.

When formulating with both ingredients, it is important to consider the requirements of each:

• pH Range: Activated Resorcinol works best in a pH range of 4.5-5.5, and Japanese Cedar is compatible with a pH range of 3.5-6.5. A final formulation pH within the 4.5-5.5 range would be suitable for both.
• Solubility: Activated Resorcinol is oil-soluble, and Japanese Cedar is water-soluble. This makes them suitable for incorporation into emulsion-based formulations like creams or lotions.
• Stability: Activated Resorcinol is light-sensitive and requires the addition of Disodium EDTA (0.2% is recommended) and protection from light in the final product packaging.

By adhering to the recommended usage rates and formulation guidelines for each ingredient, particularly the stability requirements for Activated Resorcinol, you can combine them effectively.